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Catalyst 5 /8/ 13

Catalyst 5 /8/ 13. Consider the reaction: Al + CI 2  AlCI 3 Determine the limiting reagent if you start with the following reagents 1.20 mol Al and 2.40 mol chlorine . Please make sure your IDs and uniforms are on. Al + CI 2  AlCI 3

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Catalyst 5 /8/ 13

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  1. Catalyst 5/8/13 Consider the reaction: Al + CI2 AlCI3 Determine the limiting reagent if you start with the following reagents 1.20 mol Al and 2.40 mol chlorine. Please make sure your IDs and uniforms are on.

  2. Al + CI2 AlCI3 Determine the limiting reagent if you start with the following reagents 1.20 mol Al and 2.40 mol chlorine.

  3. Agenda 5/8/13 – Period 6 • Catalyst • Announcements • Test on Stoichiometry on Thursday (tomorrow) • Packet# 12 due on Monday • Stoichiometry Summary • Stoichiometry Review

  4. Class Points Your class can earn class points if everyonein class: • Comes to class quietly and on time • Stays focused and on task during class • Leaves classroom neat and organized • Students are teaching other students • Majority of class participates • Follows all classroom expectations and procedures • And more… P3: 3 (on time, focused, neat room) P4: 3 (on time, focused, neat room) P6: 2 (on time, neat room)

  5. What if we wanted to know how efficient a chemical reaction is?

  6. According to a school official, 100 seniors are expected to graduate this June. However, only 60 seniors graduated. What percentage of seniors graduated?

  7. Objective 5/7/13 We will be able to • Calculate percent yield. • Evaluate the efficiency of a chemical reaction.  

  8. Catalyst 5/8/13 Consider the reaction: Al + CI2 AlCI3 Determine the limiting reagent if you start with the following reagents 1.20 mol Al and 2.40 mol chlorine. Please make sure your IDs and uniforms are on.

  9. Agenda 5/8/13 – Period 6 • Catalyst • Announcements • Test on Stoichiometry on Thursday (tomorrow) • Packet# 12 due on Monday • Stoichiometry Summary • Stoichiometry Review

  10. Class Points Your class can earn class points if everyonein class: • Comes to class quietly and on time • Stays focused and on task during class • Leaves classroom neat and organized • Students are teaching other students • Majority of class participates • Follows all classroom expectations and procedures • And more… P3: 3 (on time, focused, neat room) P4: 3 (on time, focused, neat room) P6: 2 (on time, neat room)

  11. Objective 5/7/13 We will be able to • Calculate percent yield. • Evaluate the efficiency of a chemical reaction.  

  12. What if we wanted to know how efficient a chemical reaction is? Stoichiometry allows us to make predictions of how much product we should make. However, should we always expect to receive all of the product in a chemical reaction?

  13. Percent Yield • The theoretical yield is the maximum amount of product that can be produced from a given amount of reactant. • The actual yield is the amount of product measured from the reaction.

  14. Formula Percent Yield = Actual Yield__ x 100 Theoretical Yield

  15. Example#1 Consider the reaction: C6H6(l) + Cl2(g)  C6H5Cl(s) + HCl(g) When 36.8 g of C6H6 react with an excess of Cl2, the actual yield of C6H5Cl is 38.8 g. What is the percent yield of C6H5Cl?

  16. IMPORTANT!!!You MUST make sure that the chemical equation is BALANCED.

  17. Example#2 Methanol can be produced through the reaction of CO and H2in the presence of a catalyst. CO (g) + 2H2(g)  CH3OH (l) If 75.0 grams of CO reacts to produce 68.4 g of methanol, what is the percentage yield of CH3OH?

  18. Stoichiometry Summary Complete the “stoichiometry summary” on page 37 of packet#12. On Notability or a blank sheet of paper, create your own “stoichiometry map” using all of the types of conversions possible. Use the “map” on top of page 6 as a guide.

  19. Check Point Describe the steps to calculate percentage yield.

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